Write the chemical formula of each compound: (a) Titanium(IV) fluoride (c) Copper(II) oxide (b) Iron(III) oxide (d) Nickel(IV) sulfide
The Correct Answer and Explanation is:
Here are the chemical formulas for each of the compounds:
(a) Titanium(IV) fluoride
Formula: TiF₄
Explanation:
- Titanium (IV) means that titanium has a charge of +4, as indicated by the Roman numeral IV.
- Fluoride (F) comes from fluorine, which has a charge of -1.
- To balance the charges, we need four fluoride ions (each with a -1 charge) to balance the +4 charge of titanium.
Thus, the formula is TiF₄.
(b) Iron(III) oxide
Formula: Fe₂O₃
Explanation:
- Iron (III) means that iron has a charge of +3.
- Oxygen (O) has a charge of -2.
- To balance the charges, we need two iron ions (each with a +3 charge) and three oxygen ions (each with a -2 charge). This results in a total charge of +6 from iron and -6 from oxygen, which are balanced.
Thus, the formula is Fe₂O₃.
(c) Copper(II) oxide
Formula: CuO
Explanation:
- Copper (II) means copper has a charge of +2.
- Oxygen (O) has a charge of -2.
- To balance the charges, one copper ion (+2) combines with one oxygen ion (-2), giving the formula CuO.
(d) Nickel(IV) sulfide
Formula: NiS₂
Explanation:
- Nickel (IV) means nickel has a charge of +4.
- Sulfide (S) comes from sulfur, which has a charge of -2.
- To balance the charges, two sulfide ions (each with a -2 charge) are needed to balance the +4 charge of nickel.
Thus, the formula is NiS₂.
In summary, the key to writing the formulas is balancing the charges of the metal cation (positive ion) and the non-metal anion (negative ion) to ensure the overall charge is neutral.
